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Gem dicyano époxydes équivalents synthétiques des dications cétènes : synthése de thiazolidinone-4 par réaction avec des thiourées substituées et évolution particulière en (aryl-cyanoformyl) méthylène-2 benzoxazole par réaction avec le thioxo-2 benzoxazole

✍ Scribed by A.Majcen Le Maréchal; A. Robert; I. Leban


Publisher
Elsevier Science
Year
1990
Tongue
French
Weight
756 KB
Volume
46
Category
Article
ISSN
0040-4020

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✦ Synopsis


The nucleophilic ring opening of gem dicyano epoxides by N-substituted or N-N' disubstituted thioureas leads to 2-imino 4-thiazolidinoncs, via postulated cyanoformyl intermediates, compounds 7 can exist in tautomeric equilibrium with a tautomeric 2-amino 4-hydroxy thiazolines. However, the cyanoformyl intermediates evolve differently when dicyano epoxides am reacted with 2thioxobenzoxazole, 2-(at-y1 cyanofotmyl) methylene txmzoxazoles.

R&urn& -L'ouverture nuclt-kphile des gem dicyano epoxydes par les thiourees N-subst.ituCes ou N-N


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